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MHT CET Physics question

PhysicsWave OpticsMHT CET

A ray of light is incident normally on a glass slab of thickness cm and refractive index . The time taken to travel by a ray from source to surface of slab is same as to travel through glass slab. The distance of source from the surface is [MHTCET 2018]

Answer: (B)

Solution

Equal times means the path in air equals the optical path in glass: $d=μ

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Question ID VK-069413